DNA replication occurs at an unbelievably fast rate. Once replication is complete, we can expect to find a _____ number of mistakes.

DNA replication occurs at an unbelievably fast rate. Once replication is complete, we can expect to find a _____ number of mistakes.

A) average
B) large
C) small








Answer: C

How do mutations affect an organism?

How do mutations affect an organism?

A) they may cause the development of a disease-causing allele
B) they may cause the development of a more beneficial allele
C) they, in some cases, may have no noticeable affect
D) all of the above

Answer: D

Which of the following is not needed in order for translation to occur?

Which of the following is not needed in order for translation to occur?

A) sources of energy, including ATP
B) tRNA
C) DNA template
D) ribosomes







Answer: C

An anticodon is _____.

An anticodon is _____.

A) a set of triplet bases that is complementary to a codon triplet on mRNA
B) the DNA sequence that is complementary to a triplet codon in a mRNA molecule, for example, CTC
C) the amino acid attachment site in a tRNA molecule
D) an enzyme that specifically binds one type of amino acid to its appropriate tRNA molecule

Answer: A

______ marks the end of a gene and causes transcription to stop.

______ marks the end of a gene and causes transcription to stop.

A) Methionine
B) A terminator
C) RNA polymerase
D) RNA ligase







Answer: B

In transcription, _____.

In transcription, _____.

A) both DNA strands are used as the templates
B) the promoter region acts as an initial binding site for mRNA
C) RNA polymerase links nucleotides to form mRNA.
D) a polypeptide is formed

Answer: C

The directions for each amino acid in a polypeptide are indicated by a codon that consists of ________ nucleotide(s) in an RNA molecule.

The directions for each amino acid in a polypeptide are indicated by a codon that consists of ________ nucleotide(s) in an RNA molecule.

A) 4
B) 2
C) 3
D) 5




Answer: C

Experiments have demonstrated that the "words" of the genetic code (the units that specify amino acids) are

Experiments have demonstrated that the "words" of the genetic code (the units that specify amino acids) are

A) two-nucleotide sequences.
B) nucleotide sequences of various lengths.
C) single nucleotides.
D) three-nucleotide sequences.






Answer: D

The "one gene-one polypeptide" theory states that

The "one gene-one polypeptide" theory states that

A) the function of each polypeptide is to regulate the synthesis of each corresponding gene.
B) the synthesis of each gene is catalyzed by one specific enzyme.
C) the synthesis of each enzyme is catalyzed by one specific gene.
D) the function of an individual gene is to dictate the production of a specific polypeptide.

Answer: D

The transfer of genetic information from DNA to RNA is called

The transfer of genetic information from DNA to RNA is called

A) translation.
B) initiation.
C) elongation.
D) transcription.






Answer: D

Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component?

Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component?

A) RNA ? DNA ? RNA ? protein
B) DNA ? tRNA ? mRNA ? protein
C) protein ? RNA ? DNA
D) DNA ? RNA ? protein

Answer: D

Which of the following enzymes catalyzes the elongation of a new DNA strand?

Which of the following enzymes catalyzes the elongation of a new DNA strand?

A) helicase
B) DNA polymerase
C) ligase
D) single-stranded binding protein

Answer: B

During replication, the original "parent" DNA _____.

During replication, the original "parent" DNA _____.

A) is converted to RNA
B) is incorporated into the new DNA strand
C) is broken down as a new DNA strand forms
D) serves as the template for the creation of two complete sets of DNA

Answer: D

What nucleotide sequence would be found on the partner DNA strand of the strand shown? A C T G T

What nucleotide sequence would be found on the partner DNA strand of the strand shown?
A
C
T
G
T

A) TGACA
B) TGUGU
C) UGAGA
D) ACTGT






Answer: A

Which of the following statements regarding RNA is false?

Which of the following statements regarding RNA is false?

A) RNA uses the sugar dextrose.
B) RNA molecules have a sugar-phosphate backbone.
C) RNA uses the nitrogenous base uracil.
D) One RNA molecule can include four different nucleotides in its structure.

Answer: A

Which of the following statements regarding DNA is false?

Which of the following statements regarding DNA is false?

A)One DNA molecule can include four different nucleotides in its structure.
B)DNA molecules have a sugar-phosphate backbone.
C)DNA uses the sugar deoxyribose.
D)DNA uses the nitrogenous base uracil.






Answer: D

The monomers of DNA and RNA are

The monomers of DNA and RNA are

A) nucleotides.
B) nucleic acids.
C) monosaccharides.
D) fatty acids.




Answer: A